Device and method for quickly detecting effective length of buried pipe

Abstract

The invention discloses a buried pipe effective length rapid detection device, which comprises a measurement module formed by sequentially communicating a head end ball valve, a water pressure stabilizing valve, a tracing small ball putting and sucking device, a tail end ball valve and a first transparent short pipe through pipelines, and the two ends of the measurement module are respectively communicated with a tap water pipeline and a buried pipe. The small tracer ball throwing and sucking device is used for throwing the small tracer ball into the measuring module; the drainage module is formed by connecting a second transparent short pipe and a drainage pipe, and the two ends of the drainage module are communicated with the buried pipe and a designated drainage point respectively; the system also comprises a timer which is used for recording the time for the small tracer ball to pass through the buried pipe. According to the method, the effective length of the buried pipe is calculated by matching the tracing ball with the same specific gravity as water with the stable water flow, so that whether the construction quality of the buried pipe or the buried length of the existing buried pipe is consistent with the original design requirement or not is detected and judged, and the negative effects caused by substandard effective length of the buried pipe are avoided; and the overall heat exchange effect of the ground source heat pump source side is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of ground source heat pump buried pipe detection, and in particular to a device and method for quickly detecting the effective length of a buried pipe. Background Art

[0002] Under the current background of energy conservation and emission reduction, ground source heat pump system, as one of the application forms of renewable energy, can bring significant emission reduction, environmental protection and economic benefits; ground source heat pump system uses water and ground energy (groundwater, soil, surface water) to exchange heat and cold through buried pipes, thereby exchanging cold and heat; the effective buried length of the buried pipe determines the overall heat exchange effect of the source side of the ground source heat pump, and the quality supervision of hidden projects such as drilling depth and pipe laying amount is relatively difficult, and the detection of the effective buried length of the buried pipe is also relatively difficult and inconvenient to operate. It is necessary to design a simple device and method that is easy to intuitively measure the effective buried length of the buried pipe. Summary of the invention

[0003] In order to solve the technical problems existing in the prior art, the present invention provides a device for quickly detecting the effective length of a buried pipe, and a method for quickly detecting the effective length of a buried pipe.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A device for quickly detecting the effective length of a buried pipe, comprising a head end ball valve, a water pressure regulating valve, a pressure gauge, a rotor flowmeter, a tracer ball, a tracer ball delivery and suction device, a tail end ball valve, a first transparent short tube, a second transparent short tube and a drain pipe; the head end ball valve, the water pressure regulating valve, the tracer ball delivery and suction device, the tail end ball valve and the first transparent short tube are sequentially connected through a pipeline to form a measuring module, the head end ball valve end of the measuring module is connected to a tap water pipeline, the first transparent short tube end of the measuring module is connected to one end of the buried pipe, the pressure gauge and the rotor flowmeter are arranged on the pipeline between the water pressure regulating valve and the tracer ball delivery and suction device, the tracer ball delivery and suction device is used to deliver the tracer ball into the measuring module, and the tracer ball follows the water flow in the measuring module into the buried pipe; the second transparent short tube and the drain pipe are connected to form a drainage module, the second transparent short tube end of the drainage module is connected to the other end of the buried pipe, and the drain pipe end of the drainage module is connected to a designated drainage point;

[0006] It also includes a timer, which is used to record the time taken by the tracer ball to pass through the buried pipe.

[0007] As a preferred embodiment of the present invention, the tracer ball delivery and suction device includes a contraction and expansion tube, a stopcock and an L-shaped ball placing tube, the transverse tube of the L-shaped ball placing tube is located inside the contraction and expansion tube, and the opening of the transverse tube of the L-shaped ball placing tube faces the tail end ball valve, the longitudinal tube of the L-shaped ball placing tube passes through the contraction and expansion tube and is located outside the contraction and expansion tube, the stopcock is arranged on the longitudinal tube of the L-shaped ball placing tube, and the stopcock is used to control the on and off of the L-shaped ball placing tube.

[0008] As a preferred embodiment of the present invention, the connection between the L-shaped ball-carrying tube and the contraction and expansion tube is located at the throat of the contraction and expansion tube, which is conducive to the formation of suction in the expansion section after the water flows through the contraction and expansion tube, and quickly sucks the tracer ball into the measurement module.

[0009] As a preferred embodiment of the present invention, the longitudinal tube of the L-shaped ball-placed tube is perpendicular to the contraction-diffusion tube.

[0010] As a preferred embodiment of the present invention, the tracer ball is a hollow plastic sphere, and the interior of the hollow plastic sphere is filled with water.

[0011] As a preferred embodiment of the present invention, the outer surface of the tracer ball has a bright color, such as red, orange, green, purple, etc., to improve the recognition of the tracer ball and facilitate observation by detection personnel.

[0012] A method for quickly detecting the effective length of a buried pipe, comprising:

[0013] (1) After the underground pipe is buried, the ball valve end of the measuring module is connected to the tap water pipe, and the first transparent short pipe end of the measuring module is connected to one end of the buried pipe; the second transparent short pipe end of the drainage module is connected to the other end of the buried pipe, and the drainage pipe end of the drainage module is connected to the designated drainage point;

[0014] (2) Open the ball valve at the head end and the ball valve at the tail end. The tap water flows through the water pressure regulating valve to stabilize the pressure and then flows to the tracer ball delivery suction device and the buried pipe. After the flow value measured by the rotor flowmeter stabilizes, read the flow value Q measured by the rotor flowmeter;

[0015] (3) placing the tracer ball into the measurement module through the tracer ball placement sucker, and using a timer to record the time t taken by the tracer ball to pass through the buried pipe;

[0016] (4) According to the formula Calculate the water velocity v, where d represents the diameter of the buried pipe; then calculate the effective length L of the buried pipe according to the formula L=v×t.

[0017] As a preferred embodiment of the method of the present invention, the water pressure P of the tap water pipeline is ≥ 0.25 MPa, and the tap water flow is stabilized to 0.15 MPa by a water pressure stabilizing valve.

[0018] The present invention is beneficial in that:

[0019] The effective length of the buried pipe is calculated by using a tracer ball with the same specific gravity as water in combination with a stable water flow. The detection method is simple and convenient, can be detected repeatedly, and the calculation result of the effective length of the buried pipe is accurate. The detected effective length of the buried pipe can be used to verify the design length of the buried pipe, and then to inspect and judge whether the construction quality of the buried pipe or the buried length of the existing buried pipe is consistent with the original design requirements, and further judge the actual heat exchange capacity of the buried pipe system to avoid adverse consequences caused by the effective length of the buried pipe not meeting the standards, and ensure the overall heat exchange effect on the source side of the ground source heat pump; in addition, the amount of water in the buried pipe can be calculated based on the circulation of the tracer ball and the water flow rate, and then the volume can be calculated in the ground pipe to determine the blockage of the buried pipe; multiple sets of devices and tracer balls of different colors can also be used to detect multiple buried pipes at the same time to sort out the buried pipe loops in various locations of the existing buried pipe system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the connection between the present invention and the buried pipe;

[0021] Figure 2 It is a schematic diagram of the structure of the measurement module of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the tracer ball of the present invention.

[0023] Meaning of the reference numerals in the figures:

[0024] 1-head end ball valve, 2-water pressure regulating valve, 3-pressure gauge, 4-rotameter, 5-tail end ball valve;

[0025] 61-first transparent short tube, 62-second transparent short tube, 7-tracer ball, 8-underground tube;

[0026] 9-contraction and expansion tube, 10-stopcock, 11-L-type ball tube;

[0027] 12- measuring module, 13- water pipe, 14- water, 15- drain pipe. DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Embodiment 1

[0030] like Figure 1-3As shown, the present embodiment is a rapid detection device for the effective length of a buried pipe, comprising a head end ball valve 1, a water pressure regulating valve 2, a pressure gauge 3, a rotor flowmeter 4, a tracer ball 7, a tracer ball delivery and suction device, a tail end ball valve 5, a first transparent short tube 61, a second transparent short tube 62 and a drain pipe 15; wherein the head end ball valve 1, the water pressure regulating valve 2, the tracer ball delivery and suction device, the tail end ball valve 5 and the first transparent short tube 61 are connected in sequence through a pipeline to form a measuring module 12, and the head end ball valve 1 end of the measuring module 12 is connected to the tap water pipe 13, and of course, it can also be connected to a temporary water supply connection point; the first end ball valve 1 end of the measuring module 12 is connected to the tap water pipe 13, and of course, it can also be connected to the ... One end of the transparent short tube 61 is connected to one end of the buried pipe 8, and the pressure gauge 3 and the rotor flowmeter 4 are arranged on the pipeline between the water pressure stabilizing valve 2 and the tracer ball delivery and suction device. The tracer ball delivery and suction device is used to deliver the tracer ball 7 into the measuring module 12, and the tracer ball 7 follows the water flow in the measuring module 12 into the buried pipe 8; the second transparent short tube 62 and the drain pipe 15 are connected to form a drainage module, and the second transparent short tube 62 end of the drainage module is connected to the other end of the buried pipe 8, and the drain pipe 15 of the drainage module is connected to the designated drainage point; a timer is also included, and the timer is used to record the time taken for the tracer ball 7 to pass through the buried pipe 8.

[0031] The water pressure stabilizing valve 2 is used to stabilize the water pressure during the test, thereby stabilizing the flow rate of tap water in the buried pipe 8 and avoiding the influence of municipal tap water pressure fluctuation on the test accuracy.

[0032] The pressure gauge 3 is used to measure the water pressure of the tap water after the water pressure regulating valve 2 stabilizes the water pressure.

[0033] The rotor flowmeter 4 is used to measure the flow rate of tap water in the buried pipe 8 and calculate the flow rate of tap water in the buried pipe 8 according to the measurement result.

[0034] In the present embodiment, the tracer ball delivery and suction device includes a contraction and expansion tube 9, a stopcock 10 and an L-shaped ball placement tube 11. The transverse tube of the L-shaped ball placement tube 11 is located inside the contraction and expansion tube 9, and the opening of the transverse tube of the L-shaped ball placement tube 11 faces the tail end ball valve 5. The longitudinal tube of the L-shaped ball placement tube 11 passes through the contraction and expansion tube 9 and is located outside the contraction and expansion tube 9. The stopcock 10 is arranged on the longitudinal tube of the L-shaped ball placement tube 11, and the stopcock 10 is used to control the on and off of the L-shaped ball placement tube 11.

[0035] In this embodiment, the connection between the L-shaped ball-placed tube 11 and the contraction and expansion tube 9 is located at the throat of the contraction and expansion tube 9, which is conducive to the formation of suction in the expansion section after the water flows through the contraction and expansion tube 9, and quickly sucks the tracer ball 7 into the measurement module 12; the longitudinal tube of the L-shaped ball-placed tube 11 is perpendicular to the contraction and expansion tube 9.

[0036] In this embodiment, the tracer ball 7 is a hollow plastic sphere with an outer diameter of 5-10 mm. The interior of the hollow plastic sphere is filled with water 14 with the same specific gravity as tap water. The outer surface of the tracer ball 7 has a bright color, such as red, orange, green, purple, etc., to improve the recognition of the tracer ball 7 and facilitate observation by detection personnel.

[0037] In this embodiment, the transparent short tube is a transparent water pipe with the same diameter as the buried pipe 8 to be tested, which is helpful for the tester to observe the tracer ball 7 entering and flowing out of the buried pipe 8, thereby improving the detection accuracy.

[0038] Embodiment 2

[0039] Reference Figure 1-3 This embodiment is a method for quickly detecting the effective length of a buried pipe, comprising:

[0040] (1) After the underground pipe 8 is buried, or for a certain underground pipe loop that has been built, the ball valve 1 end of the first end of the measuring module 12 is connected to the water pipe 13, and the first transparent short tube 61 end of the measuring module 12 is connected to one end of the underground pipe 8; the second transparent short tube 62 end of the drainage module is connected to the other end of the underground pipe 8, and the drainage pipe 15 end of the drainage module is connected to the designated drainage point;

[0041] (2) Open the ball valve 1 at the head end and the ball valve 5 at the tail end. The tap water flows through the water pressure regulating valve 2 to stabilize the pressure and then flows to the tracer ball suction device and the buried pipe 8. After the flow value measured by the rotor flowmeter 4 stabilizes, read the flow value Q measured by the rotor flowmeter 4.

[0042] (3) The tracer ball 7 is placed into the measurement module 12 by using the tracer ball placement sucker, and the time t taken by the tracer ball 7 to pass through the buried pipe 8 is recorded by using a timer;

[0043] (4) According to the formula Calculate the flow velocity v of the water flow, where d represents the diameter of the buried pipe 8 and Q represents the measured value of the rotor flowmeter 4; then calculate the effective length L of the buried pipe 8 according to the formula L=v×t, where t represents the time taken by the tracer ball 7 to pass through the buried pipe 8.

[0044] In this embodiment, the water pressure P of the tap water pipe 13 is ≥ 0.25 MPa, and the tap water flow is stabilized to 0.15 MPa by the water pressure stabilizing valve 2.

[0045] In this embodiment, the buried pipe 8 is a U-shaped buried pipe. After the construction of the U-shaped buried pipe is completed, the head end ball valve 1 end of the measuring module 12 is connected to the tap water pipe 13, and the first transparent short tube 61 end of the measuring module 12 is connected to one end of the U-shaped buried pipe; the second transparent short tube 62 end of the drainage module is connected to the other end of the U-shaped buried pipe, and the drainage pipe 15 of the drainage module is connected to the designated drainage point; open the head end ball valve 1 and the tail end ball valve 5, and the tap water flow passes through the water pressure regulating valve 2 to stabilize the pressure to 0.15MPa. After the flow value measured by the rotor flowmeter 4 is stable, read the flow value Q measured by the rotor flowmeter 4; place the tracer ball 7 In the L-shaped ball tube 11, the surface of the tracer ball 7 has a bright color; open the stopcock 10, the L-shaped ball tube 11 is connected with the contraction and expansion tube 9, and the tracer ball 7 is instantly sucked into the contraction and expansion tube 9 by using the change of the water flow pressure inside the contraction and expansion tube 9. When the tracer ball 7 is sucked, the stopcock 10 is immediately closed. When the inspection personnel sees the tracer ball 7 flowing through the first transparent short tube 61, the timer is turned on and starts timing. The tracer ball 7 flows from the inlet end to the outlet end of the U-shaped buried pipe with the stable flow of water. When the tracer ball 7 flows through the second transparent short tube 62, the timer is turned off and the timing time t of the timer is read;

[0046] According to the formula Calculate the flow velocity v of the water flow, where d represents the diameter of the U-shaped buried pipe; then calculate the effective length L of the U-shaped buried pipe according to the formula L=v×t.

[0047] The present invention uses a tracer ball with the same specific gravity as water in combination with a stable water flow to calculate the effective length of the buried pipe. The detection method is simple and convenient, and can be detected repeatedly. The calculation result of the effective length of the buried pipe is accurate. The detected effective length of the buried pipe can be used to review the design length of the buried pipe, and then to inspect and judge whether the construction quality of the buried pipe or the buried length of the existing buried pipe is consistent with the original design requirements, and further judge the actual heat exchange capacity of the buried pipe system, avoid the adverse consequences caused by the effective length of the buried pipe not meeting the standard, and ensure the overall heat exchange effect of the source side of the ground source heat pump; in addition, the water volume in the buried pipe can be deduced according to the circulation of the tracer ball and the water flow rate, and then the volume is calculated in the ground pipe to judge the blockage of the buried pipe; multiple sets of devices and tracer balls of different colors can also be used to detect multiple buried pipes at the same time, so as to sort out the buried pipe loops of various locations in the existing buried pipe system.

[0048] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present invention, it should be noted that: unless otherwise clearly stipulated and limited, the terms "installation", "connection", "setting" and "configuration" should be understood in a broad sense; for example: it can be a fixed connection, setting, or a detachable connection, setting, or an integrated structure; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements; for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A quick detection device for the effective length of a buried pipe, characterized by: It includes a head end ball valve, a water pressure regulating valve, a pressure gauge, a rotor flowmeter, a tracer ball, a tracer ball delivery sucker, a tail end ball valve, a first transparent short tube, a second transparent short tube and a drain pipe; the head end ball valve, the water pressure regulating valve, the tracer ball delivery sucker, the tail end ball valve and the first transparent short tube are connected in sequence through a pipeline to form a measuring module, the head end ball valve end of the measuring module is connected to the tap water pipeline, the first transparent short tube end of the measuring module is connected to one end of the buried pipe, the pressure gauge and the rotor flowmeter are arranged on the pipeline between the water pressure regulating valve and the tracer ball delivery sucker, the tracer ball delivery sucker is used to deliver the tracer ball into the measuring module, and the tracer ball follows the water flow in the measuring module into the buried pipe; the second transparent short tube and the drain pipe are connected to form a drainage module, the second transparent short tube end of the drainage module is connected to the other end of the buried pipe, and the drain pipe end of the drainage module is connected to a designated drainage point; It also includes a timer, which is used to record the time taken by the tracer ball to pass through the buried pipe.

2. A quick detection device for effective length of buried pipe according to claim 1, characterized in that: The tracer ball delivery and suction device includes a contraction and expansion tube, a stopcock and an L-shaped ball placement tube. The transverse tube of the L-shaped ball placement tube is located inside the contraction and expansion tube, and the opening of the transverse tube of the L-shaped ball placement tube faces the tail end ball valve. The longitudinal tube of the L-shaped ball placement tube passes through the contraction and expansion tube and is located outside the contraction and expansion tube. The stopcock is arranged on the longitudinal tube of the L-shaped ball placement tube, and the stopcock is used to control the on and off of the L-shaped ball placement tube.

3. A quick detection device for effective length of buried pipe according to claim 2, characterized in that: The connection point between the L-shaped ball-placed tube and the contraction-diffusion tube is located at the throat of the contraction-diffusion tube.

4. A quick detection device for effective length of buried pipe according to claim 2 or 3, characterized in that: The longitudinal tube of the L-shaped ball-placed tube is perpendicular to the contraction-diffusion tube.

5. The underground pipe effective length rapid detection device according to claim 1 is characterized in that: The tracer ball is a hollow plastic sphere filled with water.

6. A quick detection device for effective length of buried pipe according to claim 1 or 5, characterized in that: The outer surface of the tracer ball has a bright color.

7. A method for quickly detecting the effective length of a buried pipe according to claim 1, characterized in that: include: (1) After the underground pipe is buried, the ball valve end of the measuring module is connected to the tap water pipe, and the first transparent short pipe end of the measuring module is connected to one end of the buried pipe; the second transparent short pipe end of the drainage module is connected to the other end of the buried pipe, and the drainage pipe end of the drainage module is connected to the designated drainage point; (2) Open the ball valve at the head end and the ball valve at the tail end. The tap water flows through the water pressure regulating valve to stabilize the pressure and then flows to the tracer ball delivery suction device and the buried pipe. After the flow value measured by the rotor flowmeter stabilizes, read the flow value Q measured by the rotor flowmeter; (3) placing the tracer ball into the measurement module through the tracer ball placement sucker, and using a timer to record the time t taken by the tracer ball to pass through the buried pipe; (4) According to the formula Calculate the velocity v of the water flow, where d represents the diameter of the buried pipe; then calculate the effective length L of the buried pipe according to the formula L=v×t.

8. A method for quickly detecting the effective length of a buried pipe according to claim 7, characterized in that: The water pressure P of the tap water pipeline is ≥0.25MPa, and the tap water flow is stabilized to 0.15MPa by a water pressure stabilizing valve.

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